CVE-2026-101283
iperf3 3.20–3.21 (esnet/iperf) has a pre-auth heap buffer overflow in decrypt_rsa_message(): a 256-byte RSA buffer is BIO_read with the attacker-controlled ciphertext length (guard warns only), so an unauthenticated client overflows the heap via an oversized authtoken; fixed in 3.22
- Published Sep 30, 2026
- CVSS 9.2 critical
- 0.3% chance of exploitation in the next 30 days (EPSS)
- A fix is available